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2002 BMW M3
3.2L I6 S54•RWD•AUTOMATIC•gas•S54B32
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor498Torque3157Fluid8DTC1267Battery1Maintenance0Recalls5
P0507moderate severityPowertrain

Idle Air Control System RPM Higher Than Expected

on 2002 BMW M3 3.2L I6 S54 · RWD

What this code means

The idle speed is consistently above the target RPM.

Symptoms

  • High idle speed
  • Engine racing at idle

Common causes

  • Vacuum leak (most common)
  • IAC valve stuck open
  • Throttle plate not closing fully
  • Intake gasket leak

Diagnostic steps

  1. Check for vacuum leaks
  2. Inspect throttle plate
  3. Test IAC valve
  4. Check intake gaskets

Repair notes

Find and fix vacuum leak. Clean throttle body. Replace IAC if stuck open.

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